I have the Equal-i-zer and have helped set up several Dual-Cam units. It's really one of those 6 of one, half dozen of the other things. They're both good units and set up properly, they both do an excellent job. To me the Equal-i-zer is a bit easier to set up but it makes more noise when turning etc, than the dual cam does. The dual cam is easier to snap up into the brackets than the Equal-i-zer but if you have an electric tongue jack it's a non issue.

I use the Dual Cam, and my trailer tows sweet. A properly set up Dual Cam will keep you in a straight line going down the road, where I would think the Equalizer will tend to keep your combo at the last turn angle (never used an Equalizer, so this is speculation). I do notice with my Dual Cam when approaching a curve, that my truck wants to go a little straighter than without the trailer, but is easily overcome (classic understeer ??).

The Dual Cam is plenty noisy, even with Vaseline on the cam lobes.

Beware if you get the trunnion bar setup with the Dual Cam. If you have a 6" tongue frame, and the coupler is welded on top of the frame, there could be a spring bar rub against the cam yoke, or frame plate bolt. I had to go with a 1" raised ball to clear the frame plate bolt, and it still rubs the yoke during a hard turn. This doesn't happen with a 5" or less frame, the coupler welded to the bottom of the tongue frame, or the round bar setup.

I also have the Dual Cam Reese setup, and it is noisy, as well. It does keep sway in check very well, however. And I have an electric tongue jack, so hooking up is not too hard. I think Reese has been in the towing equipment business longer, which is why I went with them. I don't know anyone with the equalizer set up for comparison. Randy